Lennox Baltic BCK 020, Installation Operating & Maintenance Manual

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IOM / ROOFTOP BALTIC Series - 0
8
03 - E Page 47
HEATING: gas burner
PRESSURE ADJUSTMENTS ON HONEYWELL
PRESSURE REGULATING VALVE TYPE VK 4105
Pressure regulator adjustment with 300mbar gas
supply:
- The Burner must run in High Heat mode for this check.
- Place the tube of the "accurate" manometer on the Inlet
pressure port (figure 61) of the Gas Regulating Valve after
having loosened the screw by two turns.
- Check and adjust if necessary the valve Inlet pressure to
20.0 mbar (G20) or 37.0 mbar for propane (G31) or 25 mbar
for Groningue (G25).
High Heat Injection Pressure Checks
- Place the tube of the "accurate" Manometer to the OUT
port on the Gas injector support bar after having loosened
the nut.
LOW HEAT
ADJUSTMENT
HIGH HEAT
ADJUSTMENT
UNDERNEATH
Check and adjust if necessary the valve OUTLET pressure
to 8.4 mbar (G 20) / 31.4 mbar for propane (G31) and
12.3mbar for Groningue (G25).
Low Heat Injection Pressure Checks
- Switch the control to Low Heat
- Check and adjust if necessary the Outlet pressure to 3.5
mbar (G20) or 14 mbar for propane (G31) and 5 mbar for
Groningue(G25).
- Re-tighten all pressure adjustment screws and nuts.
Pressure adjustments table for each type of gas
Category Supply Low Heat High Heat
pressure injection Injection
G20 20.0 mbar 3.5 mbar 8.4 mbar
G25
(Groningue)
25.0 mbar 5.0 mbar 12.3 mbar
G31 (GPL) 37.0 mbar 14.0 mbar 31.4 mbar
INLET
PRESSURE
MEASURING
PORT
Fig. 61
Fig. 62
Fig. 63
Fig. 64
Table 5